I have a Nitryx and a Cardiff. I would buy another Nitryx before a Cardiff any day. The Okuma out casts and outperforms the Cardiff hands down.
But, if you want something even nicer that isn't going to empty your wallet, go with Okuma Induron. I know there are a few guys here using them that speak highly of them. The only reason I'm not throwing my swimbaits with an Induron is because I can't find one in the lefty model right now.